bar.tag

<bar>
  <p>bar</p>
</bar>

baz.tag

<baz>
  <p>baz</p>
</baz>

foo.tag

require('./bar.tag')
require('./baz.tag')
<foo>
  <bar></bar>
  <baz></baz>
  <script>

  </script>
</foo>

index.js

var riot = require('riot')
require('./foo.tag')

console.log(riot.render('foo'))

package.json

{
  "name": "require-test",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "Gianluca Guarini <gianluca.guarini@gmail.com> (http://gianlucaguarini.com)",
  "license": "MIT",
  "devDependencies": {
    "riot": "^2.6.2"
  }
}